Firewire Question for iMac

Yes and you can get these cables just about anywhere

iMacs produced between 1998-2009 had Firewire 400 (6 pin). iMacs produced after October 2009 had Firewire 800 (9 pin). All new iMacs have Firewire 800 (9 pin). There's a good reference article here:

http://en.wikipedia.org/wiki/IEEE_1394

The Weiss Dac 2 has Firewire 400, so if your iMac is older than Oct 2009, you'll need a FW 400 cable like this:

http://eshop.macsales.com/item/NewerTech/1394A66012/

If your iMac is newer than Oct 2009, you'll need a FW400 to FW800 cable like this:

http://eshop.macsales.com/item/NewerTech/1394B96012/

Or you can use a FW400 cable with a FW800 adaptor on one end:

http://eshop.macsales.com/item/NewerTech/FIR1369AD/

Mingles thanks so much for your response. It was very helpful. Since my FW800 port is being used for an external HD I will use the FW400 for the Weiss. It will be a straight 6 pin to 6 pin.

Not sure why my iMac has both FW400 and FW800 but heck, I'll take it!

Not sure why my iMac has both FW400 and FW800 but heck, I'll take it!

During the transition from FW400 to FW800, iMacs had both. You're lucky!

I have had good luck with Audioquest Forest Firewire 6 to 9 pin cables. Some sellers on Amazon sell them at quite reasonable prices.